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在汽车和电动汽车中需要的PWB必须具有高的热传导性和良好的连接可靠性。根据安装在汽车引擎室内的环境要求,日本新神户电机公司新开发的具有超过150℃玻璃化温度的金属基覆铜板CEL-323。该覆铜板制作的PWB在-40℃~125℃下进行冷热循环实验,无铅焊接通过了3000次的冷热循环实验,镀通孔连接通过了超过3000个冷热循环的实验,被确认比常规的FR-4材料更可靠。
PWBs needed in automobiles and electric vehicles must have high thermal conductivity and good connection reliability. According to the requirements of the environment installed in the engine room of the automobile, a new metal-clad laminate CEL-323 with a glass transition temperature exceeding 150 ° C has been newly developed by Japan’s Kobelco Electric Company. The PWB made by the CCL was subjected to a thermal cycling test at -40 ° C to 125 ° C. The lead-free soldering passed 3,000 cycles of thermal cycling, and the through-hole connection passed an experiment of more than 3,000 cycles of heating and cooling, and was confirmed More reliable than conventional FR-4 materials.